We've released a mandatory update for Team Fortress 2. The update notes are below. The new version number is 3755511.

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Happy Smissmas 2016!- All players who play TF2 during the event will receive a Stuffed Stocking as a gift! Stockings contain goodies for good little Mercenaries.- Added the limited-time key-less Winter 2016 Cosmetic Case to the Mann Co. Store - Contains 17 new community-contributed items - The Festivizer can be found as a bonus drop when opening the case- Added 3 new taunts to the Mann Co. Store - The Scotsmann's Stagger (community-contributed) - The Didgeridrongo (community-contributed) - The Table Tantrum (Valve)- New weapons for the Festivizer! - Fire Axe, The Jag, The Kritzkrieg, Pistol, The Quick-Fix, Natascha, The Sandman, The Spy-cicle, Kukri, Shovel and The Scottish Resistance- Mann Co. Store winter sale! - Look for 20%-75% off selected unlocked cosmetic crates, taunts, and tools in the Mann Co. Store through January 11th, 2017- Matchmaking Improvements - At the end of a Casual match, players are automatically formed into a new match with the same players and teams - Players get to vote on which map the new match will take place on - There are 3 maps to vote on, chosen based on the maps everyone in the match had selected when they began searching for a match. The current map is always the first option. - This replaces the Rematch system - Players can now set their maximum acceptable ping by clicking the new gear icon in the top right of the Casual and Competitive matchmaking lobby screens and choosing "Ping Settings"- New autobalance system to help with balancing teams when players leave a match. The system will ask players to volunteer to switch teams. - Automatically enabled for all Casual match servers - Players who switch will be able to earn bonus XP as a reward - Community servers can enable this new feature by using "mp_autoteambalance 2"

General- Fixed security issue reported by Justin G. (sigsegv) and Linus S. (PistonMiner)- Fixed not clearing the teleport condition for players who have their teleport interrupted before the teleport is complete- Fixed PASS Time exploit related to bonus points- Updated mat_monitorgamma so it can be adjusted in Competitive mode- Fixed the ShouldPreserveSquad flag not being parsed correctly in Mann vs. Machine mode- Fixed a bug related to bot Engineers and teleporters in Mann vs. Machine mode- Fixed not being able to transfer Strange stats between versions of Jarate and the Sapper- Fixed incorrect particle position for Unusual taunt effects when using the Racho Relaxo- Added the ESA Rewind tournament medals- Added the Winter Wonderland 2016 community medals- Updated the Dalokohs Bar to fix a bug related to the health buff- Updated cp_metalworks to fix a texture problem- Updated pd_watergate - Respawn times will now change depending on which team is in the lead: 8 seconds to leading team, 4 seconds to trailing team - Moved the current beer amount to the center of the HUD - Added a jump to low spawn route to give respawned players something to do en-route to mid - Added a light to illuminate roof-snipers better - Adjusted some clipping